Analog Devices Inc. ADT7604 Thermal Measurement & Leak Sensing System
Analog Devices ADT7604 Data Center Thermal Measurement and Leak Sensing System measures a wide variety of temperature sensors and digitally outputs the result, in °C, °F, or Ω, with 0.1°C accuracy and 0.001°C resolution. The device measures temperature with standard 2-, 3-, or 4-wire RTDs and thermistors. It has 20 reconfigurable analog inputs enabling many sensor connections and configuration options. The ADT7604 includes excitation current sources and fault-detection circuitry appropriate for each temperature-sensor type, as well as an EEPROM for storing custom coefficients and channel configuration data.
The ADT7604 features accurate temperature measurement with copper trace sensors, which are thin copper traces integrated into PCBs or laminate substrates and can be placed in mechanically hard-to-reach locations to detect thermal hotspots. The ADT7604 also accurately measures resistive leak sensors for safety monitoring in liquid-handling systems.
The Analog Devices ADT7604 allows direct interfacing to ground-referenced sensors without the need for level shifters, negative supply voltages, or external amplifiers. All signals are buffered and digitized simultaneously using two high-accuracy, 24-bit Δ-Σ ADCs.
Features
- Directly digitizes
- Copper trace temperature sensors
- Liquid leakage sensing
- 2-, 3-, or 4-wire RTDs
- Thermistors
- Zero-config startup through on-chip EEPROM
- Single 2.85V to 5.25V supply
- No negative supply required
- 20 single-ended/10 differential inputs allow interchanging sensors
- Built-in standard and user-programmable coefficients for RTDs and thermistors
- Automatic open-circuit, short-circuit, and fault detection
- Buffered inputs allow external filtering
- Simultaneous 50Hz/60Hz rejection
Applications
- AI/HPC datacenter liquid cooling systems
- Server rack thermal management
- Industrial process control and monitoring
- CDU and coolant distribution unit monitoring
Typical Application
Development Tool
Analog Devices Inc. EVAL-ADT7604-AZ Evaluation Board
Evaluates the ADT7604, a 20-channel data center thermal-measurement and leak-sensing system.